This is the actual re-write.

Use a clang rewriter to rewrite SvStream::operator<< to methods
like WriteuInt32.
Note that the rewriter is not perfect, and I hand-tweaked the output.
In particular, I had to adjust places doing things like
  (*this) << 1;

Change-Id: I5923eda3f4ebaa8b452b6ef109e726e116235a2a
Reviewed-on: https://gerrit.libreoffice.org/7342Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>